Here's everything you need to know before Tuesday's opening bell

1. Shares of LongFin (LFIN) were slightly down premarket after jumping 229% on Monday. 

2. (CARS - Get Report) jumped after hours after disclosing that Starboard bought a stake in the online auto marketplace. 

3. Earnings are expected from Carnival (CCL - Get Report) , Darden (DRI - Get Report) , Micron (MU - Get Report) and more. 

4. U.S. futures pointed toward more records ahead of an anticipated tax reform vote.

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